/**
 * #      1578
 * 名称   避免重复字母的最小删除成本
 * 链接   https://leetcode-cn.com/problems/minimum-deletion-cost-to-avoid-repeating-letters
 * 题解   [176](https://leetcode-cn.com/problems/minimum-deletion-cost-to-avoid-repeating-letters/solution)
 * 通过率 57.4%
 * 难道   中等
 */

